<template>

  <div class="app-container">

    <h2 style="text-align: center;">发布新课程</h2>

    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="最终发布"/>
    </el-steps>

<el-button type="text" @click="openChapterDialog()">添加章节</el-button>

    <!-- 章节 -->
    <ul class="chanpterList">
        <li
            v-for="chapter in chapterVideoList"
            :key="chapter.id">
            <p>
                {{ chapter.title }}

                <span class="acts">
                    <el-button style="" type="text" @click="openVideo('chapter',chapter.id,'','')">添加小节</el-button>
                    <el-button style="" type="text" @click="openEditChatper(chapter.id)">编辑</el-button>
                    <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
                </span>
            </p>

            <!-- 视频 -->
            <ul class="chanpterList videoList">
                <li
                    v-for="video in chapter.children"
                    :key="video.id">
                    <p>{{ video.title }}

                <span class="acts">
                    
                    <el-button style="" type="text" @click="openVideo('video',video.id,video.title,chapter.id,video.videoSourceId,video.isFree)">编辑</el-button>
                    <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
                </span>
                    </p>
                </li>
            </ul>
        </li>
    </ul>
    <div>
        <el-button @click="previous">上一步</el-button>
        <el-button :disabled="this.saveBtnDisabled" type="primary" @click="next">下一步</el-button>
    </div>

    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
        <el-form :model="chapter" label-width="120px">
            <el-form-item label="章节标题">
                <el-input v-model="chapter.title"/>
            </el-form-item>
            <el-form-item label="章节标号">
                <el-input-number v-model="chapter.sort" :min="0" controls-position="right" />
                <el-tooltip placement="right-end">
                    <div slot="content">
                        暂时没用
                    </div>
                    <i class="el-icon-question"/>
                </el-tooltip>
            </el-form-item>
        </el-form>
        <div slot="footer" class="dialog-footer">
            <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
            <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
        </div>
    </el-dialog>

    <!-- 添加和修改课时表单 -->
<el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
  <el-form :model="this.video" label-width="120px">
    <el-form-item label="课时标题">
      <el-input v-model="video.title"/>
    </el-form-item>
    <el-form-item label="课时排序">
      <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
      <el-tooltip placement="right-end">
            <div slot="content">
                暂时没用
            </div>
            <i class="el-icon-question"/>
        </el-tooltip>
    </el-form-item>
    <el-form-item label="是否免费">
      <el-radio-group v-model="video.isFree">
        <el-radio :label="true">免费</el-radio>
        <el-radio :label="false">付费</el-radio>
      </el-radio-group>
    </el-form-item>
    <el-form-item label="videoId">
        <el-input v-model="video.videoSourceId" disabled>
        </el-input>
        <el-button @click="handleVodRemove">删除存在视频</el-button>
    </el-form-item>
    
    <el-form-item label="上传视频">
        <el-upload
            :before-upload="handleUploadBefore"
            :on-success="handleVodUploadSuccess"
            :on-remove="handleVodRemove"
            :before-remove="beforeVodRemove"
            :on-exceed="handleUploadExceed"
            :file-list="fileList"
            :action="BASE_API+'/eduvod/video/uploadVideo'"
            :limit="1"
            class="upload-demo">
        <el-button size="small" type="primary">上传视频</el-button>
        <el-tooltip placement="right-end">
            <div slot="content">最大支持1G，<br>
                支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
            <i class="el-icon-question"/>
        </el-tooltip>
        </el-upload>
    </el-form-item>

  </el-form>
  <div slot="footer" class="dialog-footer">
    <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
    <el-button :disabled="this.saveVideoBtnDisabled==false" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
  </div>
</el-dialog>

  </div>
</template>
<script>
import chapter from '@/api/edu/chapter'
import videoUp from '@/api/edu/video'
import {Message} from 'element-ui'

export default {
    data() {
        return {
            saveBtnDisabled:false,
            courseId:'',//课程id
            chapterVideoList:[],
            chapter:{ //封装章节数据
                courseId:'',
                title: '',
                sort: 0
            },
            video: {
                id:'',
                chapterId:'',
                courseId:'',
                title: '',
                sort: 0,
                isFree: false,
                videoSourceId: '',
                videoOriginalName:'',//视频名称
            },
            isUpdateVideo: false,
            saveVideoBtnDisabled:true,//按钮禁用
            dialogChapterFormVisible:false,//章节弹框
            dialogVideoFormVisible:false, //小节弹框


            fileList: [],//上传文件列表
            BASE_API: process.env.BASE_API // 接口API地址
        }
    },
    created() {
        //获取路由的id值
        if(this.$route.params && this.$route.params.id) {
            this.courseId = this.$route.params.id
            //根据课程id查询章节和小节
            this.getChapterVideo()
        }
    },
    methods:{
        //点击确定调用的方法
        handleVodRemove() {
            if(this.video.videoSourceId == ""){
                Message.error("未上传视频");
                return;
            }
            //调用接口的删除视频的方法
            videoUp.deleteAliyunvod(this.video.videoSourceId)
                .then(response => {
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除视频成功!'
                    });
                    //把文件列表清空
                    this.fileList = []
                    //把video视频id和视频名称值清空
                    //上传视频id赋值
                    this.video.videoSourceId = ''
                    //上传视频名称赋值
                    this.video.videoOriginalName = ''
                })
        },
        //点击×调用这个方法
        beforeVodRemove(file,fileList) {
            return this.$confirm(`确定移除 ${ file.name }？`);
        },
        // 上传之前
        handleUploadBefore(){
            this.saveVideoBtnDisabled = false;
            console.log("上传")
            if(this.video.videoSourceId != ""){
                Message.error("请先删除已存在的视频再上传，如果删除失败则继续上传",3000);
            }
        },
        //上传视频成功调用的方法
        handleVodUploadSuccess(response, file, fileList) {
            //上传视频id赋值
            this.video.videoSourceId = response.data.videoId
            //上传视频名称赋值
            this.video.videoOriginalName = file.name
            this.saveVideoBtnDisabled = true
            this.fileList = []
        },
        handleUploadExceed() {
            this.$message.warning('想要重新上传视频，请先删除已上传的视频')
        },
//==============================小节操作====================================
        //删除小节
        removeVideo(id) {
            this.$confirm('此操作将删除小节, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                videoUp.deleteVideo(id)
                    .then(response =>{//删除成功
                    //提示信息
                    console.log(response);
                    this.$message({
                        type: 'success',
                        message: '删除小节成功!'
                    });
                    //刷新页面
                    this.getChapterVideo()
                })
            }).catch(() =>{
                console.log("取消");
                this.video.title = '';
                this.video.id = '';
            }) //点击取消，执行catch方法
        },
        //添加小节弹框的方法
        openVideo(type,id,title,chapterId,SourceId,isFree) {
            //弹框
            if(type == 'chapter'){
                this.video.id = '';
                this.video.title = '';
                this.video.chapterId = id;
                this.isUpdateVideo = false;
            }
            else{
                this.video.isFree = isFree;
                this.video.id = id;
                this.video.courseId = this.courseId;
                this.isUpdateVideo = true;
                this.video.title = title;
                this.video.chapterId = chapterId;
                this.video.videoSourceId = SourceId;
                console.log(this.video)
            }
            this.dialogVideoFormVisible = true;
        },
        openVideoSmall(videoId) {
            this.$message({
                type: 'error',
                message: '功能正在开发中!'
            }); 
        },
        //添加小节
        addVideo() {
            //设置课程id
            this.video.courseId = this.courseId;
            videoUp.addVideo(this.video)
                .then(response => {
                    console.log(response);
                    //关闭弹框
                    this.dialogVideoFormVisible = false;
                    //提示
                    this.$message({
                        type: 'success',
                        message: '添加小节成功!'
                    });
                    // 清空
                    this.video.chapterId = '';
                    //刷新页面
                    this.getChapterVideo()
                })
        },
        updateVideo(){
            console.log("updateVideo:")
            if(this.video.videoSourceId == null){
                Message.error("视频为空")
                return;
            }
            videoUp.updateVideo(this.video)
                .then(response => {
                    console.log(response);
                    //关闭弹框
                    this.dialogVideoFormVisible = false;
                    //提示
                    this.$message({
                        type: 'success',
                        message: '修改小节成功!'
                    });
                    console.log(this.video) 
                    // 清空
                    // this.video.chapterId = '';
                    //刷新页面
                    this.getChapterVideo()
                })
        },
        saveOrUpdateVideo() {
            if(this.isUpdateVideo == false){
                console.log("添加")
                this.addVideo()
            }
            else{
                console.log("修改")
                this.updateVideo()
            }
        },

//==============================章节操作====================================
        //删除章节
        removeChapter(chapterId) {
            this.$confirm('此操作将删除章节, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                chapter.deleteChapter(chapterId)
                    .then(response =>{//删除成功
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除成功!'
                    });
                    //刷新页面
                    this.getChapterVideo()
                })
            }) //点击取消，执行catch方法
        },
        //修改章节弹框数据回显
        openEditChatper(chapterId) {
            //调用接口
            this.video.chapterId = chapterId;
            chapter.getChapter(chapterId)   
                .then(response => {
                    //弹框
                    this.dialogChapterFormVisible = true
                    this.chapter = response.data.chapter
                })
        },
        //弹出添加章节页面
        openChapterDialog() {
            //弹框
            this.dialogChapterFormVisible = true
            //表单数据清空
            this.chapter.title = ''
            this.chapter.sort = 0
        },
        //添加章节
        addChapter() {
            //设置课程id到chapter对象里面
            this.chapter.courseId = this.courseId;
            chapter.addChapter(this.chapter)
                .then(response => {
                    //关闭弹框
                    this.dialogChapterFormVisible = false
                    //提示
                    this.$message({
                        type: 'success',
                        message: '添加章节成功!'
                    });
                    //刷新页面
                    this.chapter.id = '';
                    this.getChapterVideo()
                })
        },
        //修改章节的方法
        updateChapter() {
            chapter.updateChapter(this.chapter)
                .then(response =>  {
                    //关闭弹框
                    this.dialogChapterFormVisible = false
                    //提示
                    this.$message({
                        type: 'success',
                        message: '修改章节成功!'
                    });
                    this.chapter.id = '';
                    //刷新页面
                    this.getChapterVideo()
                })
        },
        saveOrUpdate() {
            if(!this.chapter.id) {
                console.log("添加")
                this.addChapter()
            } else {
                console.log("修改")
                this.updateChapter()
            }
        },
        //根据课程id查询章节和小节
        getChapterVideo() {
            chapter.getAllChapterVideo(this.courseId)
                .then(response => {
                    this.chapterVideoList = response.data.chapterList
                    console.log(this.chapterVideoList)
                })
        },
        previous() {
            this.$router.push({path:'/course/info/'+this.courseId})
        },
        next() {
            //跳转到第二步
            this.$router.push({path:'/course/publish/'+this.courseId})
        }
    }
}
</script>
<style scoped>
.chanpterList{
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
}
.chanpterList li{
  position: relative;
}
.chanpterList p{
  float: left;
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #DDD;
}
.chanpterList .acts {
    float: right;
    font-size: 14px;
}

.videoList{
  padding-left: 50px;
}
.videoList p{
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #DDD;
}

</style>